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 | bela825
Join Date: Dec 2013 Posts: 3 South Dakota 
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2013-12-07 188414
Hello, I have a 1994 825 Belarus, I believe it has what is called a "preheater" when I first purchased the tractor (6 years ago) I would turn the key switch on, then press a button on the left side of dash, a light on the right side of dash would brighten up then I would start the tractor. after doing this a few times, the light stopped coming on. I did a little research and realized I was supposed to be adding fuel to a small canister on top of valve cover. My question is; did I do permanent damage to the preheater system? Is there something I can test? Tractor works excellent otherwise. Any help would be appreciated.
Thanks
Jeff
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| bela825
Join Date: Dec 2013 Posts: 3 South Dakota
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2013-12-07 188418
Anybody have any ideas? Or can direct me to the resource I need?
Thanks ....
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| hayman68
Join Date: Dec 2013 Posts: 3 Canada
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2013-12-26 188525
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There is 2 wires hooked up to the preheater, a heavy gauge and lighter gauge wire. When you push the button on the dash the heavier gauge wire should have power on it. Then once the starter encages the other wire will have power too which allows diesel to drip down on the hot coil. If the light doesn't light up in the dash anymore the element maybe burned out or you have a something else wrong. Check it for power 1st at the preheater then go from there. It its at fault it comes off easy with a couple bolts. Also the little orfice in the preheater can get plugged, just take it off and blow some compressed air through it.
The preheater can be ordered online if you don't have a close dealer from either of these sites in the USA
http://www.tractorjoe.com/parts/p/efp-8101500-pre-heater-5/mt/tractor/b/belarus/m/825/?c=372&sc=1438
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Link: Belarus Parts USA
Picture Link
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| Chadk66
Join Date: Mar 2023 Posts: 24 Williston ND
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2023-03-09 201505
Put a block heater in it if you don’t have one. Then plug it in a few hours before you need it or if you use it daily leave it plugged in at night. Your motor will thank you ....
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada 
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2023-03-18 201531
They ran a similar system on the Ford tractors called “Thermostart”, but with a clever twist.
The fuel reservoir for the heater was inline with the excess fuel return line from the injectors to the tanks, the fuel only got to the tank when the reservoir was full.
It would probably be fairly easy to reproduce on your unit.
Best of luck. ....
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